Air duct heaters
Air duct heater
Rating： From 0.5kW 2000kW (Max) in Single or combination
Design Temperature：-40 deg C to 600 degrees C
Element Sheath： Ss / Alloy 800 series
Duct Body： Ms/ss
Insulation： Ceramic glass wool
Cladding： SS / Aluminum
Terminal Enclosure： Weatherproof or Flameproof
Control System： Thyristor control or Contactor control Thermostatic control ( Low wattage& single-phase systems)
Protections &control: Element Skin Temperature controls process temperature control Earth leakage protection. Overload current protection.
Installation: Horizontal / Vertical
Note : For custom design requirements please contact factory
• Heat treating
• Forced air comfort heating
• Booster air heater
• Air drying operations
• Core drying
• Air pre-heating
• Air handling equipment
• Fan coils
• Terminal reheating
• Multizone reheating
• Heat pump auxiliary systems
• Return air heating
• Resistor load banks
• Annealing(chrysanthemum drying, material drying,farm insulation,Pig factory insulation)
Types of the Air tubular heater
Flange-type electric heater. Type F
1. Position the electric heater in front of the duct flange.
2. Secure the electric heater to the duct by using metal screws or bolts through the duct flanges.
3. If necessary, install supports to maintain the electric heater.
With the round adapter option
1. Insert an electric heater between the two sections of the round duct.
2. Secure the electric heater by using metal screws through round
flanges.
3. If necessary, install supports to maintain the electric heater.
Slip-in type electric heater Type l
1) Cut an opening in the duct. Please allow 以 (6.3mm) more than the frame width “D
2) Insert the electric heater through the opening.
3) Secure the electric heater onto the duct using metal screws.2 flanges 1”(25.4mm) are provided on each side of the control
panel.
4) If necessary, re-enforced the duct rigidity by installing appropriate support(s).
Air duct heater Construction
The structure of the heater can be viewed from the following aspects, which have been explained in detail.
1. Three distinct types of heating elements are available: Tubular Heating Elements, Finned Elements, Open Coil Heating Elements
2. Support Baffle Plate: This feature firmly anchors the heating elements, mitigating vibrations.
3. Mounting Flange/Plate: This component attaches the heating elements to the duct’s external structure. The plate’s size and shape vary based on the heater’s rating and dimensions. The heating elements can be attached with removable adapters or permanently welded, depending on the application.
4. Terminal Box: Typically a rectangular enclosure, it houses all element terminals, internally wired in clusters. The terminal box can be a standard sheet metal design for safe areas or a flameproof version for hazardous environments.
Special duct heater
Special air duct heaters are custom-engineered heating solutions designed to meet unique application requirements. These heaters are versatile and can be configured to accommodate a wide range of environments and conditions. The following are two special types of products.
High efficiency: up to 95% or more;
Clean gas, small size;
Power per unit: 2KW-2000KW;
lt is durable and has a service life of several decades;
The rate of heating and cooling is fast, up to 10 “C / S:
Temperature and flow of air outlet are under control, variable frequency and speed can be regulated:
The gas can reach 800 “C, and the shell temperature is only about 50 “C.
Temperature control drift would not occur, suitable for automatic control:
A heating body made of alloy material is superior to any other heat source in mechanical properties:
Various types of high-temperature air heaters can be designed according to the user’s needs.
